Micronutrients & recovery
Excessive consumption of certain seaweeds, particularly those high in iodine or accumulating toxic metals like arsenic, cadmium, or lead, poses potential health risks and requires adherence to safety regulations regarding toxic element limits.
Be mindful of the source and type of seaweed you consume. Some seaweeds, especially brown varieties like Kombu, are extremely high in iodine, which can be harmful in excess. Others may accumulate toxic metals like arsenic or lead. To minimize risk, choose seaweeds from regulated aquaculture sources and vary your intake to avoid excessive exposure to any single mineral or toxin.
However, seaweeds accumulate not only desirable minerals but also undesirable metals from the surrounding environment, which can affect their safety for human consumption... The USA, France, Australia, and New Zealand have established specific regulations for toxic elements in edible seaweeds.
Why this rating
The paper cites regulatory bodies and specific data on toxic metal concentrations.
Source
Minerals in edible seaweed: health benefits and food safety issues
Ivonne Lozano‐Muñoz et al. · Critical Reviews in Food Science and Nutrition · 2020
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